Patent DE-102007021244-A1 (DE)
Title: Gas entry rotor for use in bioreactors for optimizing the exchange of material for the cultivation of microorganisms in fluid column, has gas outlet opening from which the gas is sucked, gas withdrawal drillings and cylindrical bases
Inventor: ZACHER KARL-HEINZ
IPC: C12M1/04
Filed: 2007-05-07
Abstract: The gas entry rotor for use in bioreactors for the optimization of the exchange of material for the cultivation of microorganisms in fluid columns, comprises gas outlet opening from which the gas can be sucked. The gas entry rotor is stored hanging over bearing bushes on a hollow axle and by rear cut over gas withdrawal drillings (10) sucks the gas from outlet opening that can be automatically opened and lockable, and is entered into the fluid. Cylindrical bases (4, 5) and the bearing bushes include in such a way that in a centric through-hole a free space develops. The gas entry rotor for use in bioreactors for the optimization of the exchange of material for the cultivation of microorganisms in fluid columns, comprises gas outlet opening from which the gas can be sucked. The gas entry rotor is stored hanging over bearing bushes on a hollow axle and by rear cut over gas withdrawal drillings (10) sucks the gas from outlet opening that can be automatically opened and lockable, and is entered into the fluid. Cylindrical bases (4, 5) and the bearing bushes include in such a way that in a centric through-hole a free space develops. The free space forms a starting point for four gas withdrawal drillings, which lead up to the lower gas entry rotor edge (11). At the cylindrical outer walls (12) in each case two diagonal slots cooperating at the upper gas entry rotor edge forms in connection with semicircular recesses at the front surface of thin-walled bars. In each case two slots supply fluid downwardly and upwardly independent of direction rotation and vertically and radially produce spiral flows. By the thin-walled bars the rear cuts result directly at the gas withdrawal drillings. The hollow axle at the lower end locked with a stop ring is limited and contains position-defined gas inlet openings and gas outlet openings. By raising of the gas entry rotor over an inductive magnetic field on the hollow axle the gas outlet openings are opened. By lowering the gas entry rotor on the stop ring the gas inlet openings are locked. The hollow axle at the upper end contains a thread or a transverse groove. The gas entry takes place independent of direction of rotation. Casing caps are adjusted transitionlessly to the external radius of the gas entry rotor. Two recesses lying oppositely and extending inwardly in the gas entry rotor by smallest drillings in the surface areas are connected with the through-hole. The casing caps in connection with magnets are pressed in the recesses under vacuum in the rotor and through compressing of the coat caps are connected form conclusively and tightly. With the procedure, through smallest drillings during pressing of the casing caps air from the recesses is pressed in the centric through-hole and locks over the bearing bushes again to position magnets without compressed air inclusions in the gas entry rotor.